| Current File : //proc/self/root/usr/lib/modules/6.8.0-59-generic/build/samples/bpf/test_lwt_bpf.sh |
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Uncomment to see generated bytecode
#VERBOSE=verbose
NS1=lwt_ns1
NS2=lwt_ns2
VETH0=tst_lwt1a
VETH1=tst_lwt1b
VETH2=tst_lwt2a
VETH3=tst_lwt2b
IPVETH0="192.168.254.1"
IPVETH1="192.168.254.2"
IPVETH1b="192.168.254.3"
IPVETH2="192.168.111.1"
IPVETH3="192.168.111.2"
IP_LOCAL="192.168.99.1"
PROG_SRC="test_lwt_bpf.c"
BPF_PROG="test_lwt_bpf.o"
TRACE_ROOT=/sys/kernel/tracing
CONTEXT_INFO=$(cat ${TRACE_ROOT}/trace_options | grep context)
function lookup_mac()
{
set +x
if [ ! -z "$2" ]; then
MAC=$(ip netns exec $2 ip link show $1 | grep ether | awk '{print $2}')
else
MAC=$(ip link show $1 | grep ether | awk '{print $2}')
fi
MAC="${MAC//:/}"
echo "0x${MAC:10:2}${MAC:8:2}${MAC:6:2}${MAC:4:2}${MAC:2:2}${MAC:0:2}"
set -x
}
function cleanup {
set +ex
rm $BPF_PROG 2> /dev/null
ip link del $VETH0 2> /dev/null
ip link del $VETH1 2> /dev/null
ip link del $VETH2 2> /dev/null
ip link del $VETH3 2> /dev/null
ip netns exec $NS1 killall netserver
ip netns delete $NS1 2> /dev/null
ip netns delete $NS2 2> /dev/null
set -ex
}
function setup_one_veth {
ip netns add $1
ip link add $2 type veth peer name $3
ip link set dev $2 up
ip addr add $4/24 dev $2
ip link set $3 netns $1
ip netns exec $1 ip link set dev $3 up
ip netns exec $1 ip addr add $5/24 dev $3
if [ "$6" ]; then
ip netns exec $1 ip addr add $6/32 dev $3
fi
}
function get_trace {
set +x
cat ${TRACE_ROOT}/trace | grep -v '^#'
set -x
}
function cleanup_routes {
ip route del ${IPVETH1}/32 dev $VETH0 2> /dev/null || true
ip route del table local local ${IP_LOCAL}/32 dev lo 2> /dev/null || true
}
function install_test {
cleanup_routes
cp /dev/null ${TRACE_ROOT}/trace
OPTS="encap bpf headroom 14 $1 obj $BPF_PROG section $2 $VERBOSE"
if [ "$1" == "in" ]; then
ip route add table local local ${IP_LOCAL}/32 $OPTS dev lo
else
ip route add ${IPVETH1}/32 $OPTS dev $VETH0
fi
}
function remove_prog {
if [ "$1" == "in" ]; then
ip route del table local local ${IP_LOCAL}/32 dev lo
else
ip route del ${IPVETH1}/32 dev $VETH0
fi
}
function filter_trace {
# Add newline to allow starting EXPECT= variables on newline
NL=$'\n'
echo "${NL}$*" | sed -e 's/bpf_trace_printk: //g'
}
function expect_fail {
set +x
echo "FAIL:"
echo "Expected: $1"
echo "Got: $2"
set -x
exit 1
}
function match_trace {
set +x
RET=0
TRACE=$1
EXPECT=$2
GOT="$(filter_trace "$TRACE")"
[ "$GOT" != "$EXPECT" ] && {
expect_fail "$EXPECT" "$GOT"
RET=1
}
set -x
return $RET
}
function test_start {
set +x
echo "----------------------------------------------------------------"
echo "Starting test: $*"
echo "----------------------------------------------------------------"
set -x
}
function failure {
get_trace
echo "FAIL: $*"
exit 1
}
function test_ctx_xmit {
test_start "test_ctx on lwt xmit"
install_test xmit test_ctx
ping -c 3 $IPVETH1 || {
failure "test_ctx xmit: packets are dropped"
}
match_trace "$(get_trace)" "
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX" || exit 1
remove_prog xmit
}
function test_ctx_out {
test_start "test_ctx on lwt out"
install_test out test_ctx
ping -c 3 $IPVETH1 || {
failure "test_ctx out: packets are dropped"
}
match_trace "$(get_trace)" "
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 0 ifindex 0
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 0 ifindex 0
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 0 ifindex 0" || exit 1
remove_prog out
}
function test_ctx_in {
test_start "test_ctx on lwt in"
install_test in test_ctx
ping -c 3 $IP_LOCAL || {
failure "test_ctx out: packets are dropped"
}
# We will both request & reply packets as the packets will
# be from $IP_LOCAL => $IP_LOCAL
match_trace "$(get_trace)" "
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 1 ifindex 1
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 1 ifindex 1
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 1 ifindex 1
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 1 ifindex 1
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 1 ifindex 1
len 84 hash 0 protocol 8
cb 1234 ingress_ifindex 1 ifindex 1" || exit 1
remove_prog in
}
function test_data {
test_start "test_data on lwt $1"
install_test $1 test_data
ping -c 3 $IPVETH1 || {
failure "test_data ${1}: packets are dropped"
}
match_trace "$(get_trace)" "
src: 1fea8c0 dst: 2fea8c0
src: 1fea8c0 dst: 2fea8c0
src: 1fea8c0 dst: 2fea8c0" || exit 1
remove_prog $1
}
function test_data_in {
test_start "test_data on lwt in"
install_test in test_data
ping -c 3 $IP_LOCAL || {
failure "test_data in: packets are dropped"
}
# We will both request & reply packets as the packets will
# be from $IP_LOCAL => $IP_LOCAL
match_trace "$(get_trace)" "
src: 163a8c0 dst: 163a8c0
src: 163a8c0 dst: 163a8c0
src: 163a8c0 dst: 163a8c0
src: 163a8c0 dst: 163a8c0
src: 163a8c0 dst: 163a8c0
src: 163a8c0 dst: 163a8c0" || exit 1
remove_prog in
}
function test_cb {
test_start "test_cb on lwt $1"
install_test $1 test_cb
ping -c 3 $IPVETH1 || {
failure "test_cb ${1}: packets are dropped"
}
match_trace "$(get_trace)" "
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0" || exit 1
remove_prog $1
}
function test_cb_in {
test_start "test_cb on lwt in"
install_test in test_cb
ping -c 3 $IP_LOCAL || {
failure "test_cb in: packets are dropped"
}
# We will both request & reply packets as the packets will
# be from $IP_LOCAL => $IP_LOCAL
match_trace "$(get_trace)" "
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0
cb0: 0 cb1: 0 cb2: 0
cb3: 0 cb4: 0" || exit 1
remove_prog in
}
function test_drop_all {
test_start "test_drop_all on lwt $1"
install_test $1 drop_all
ping -c 3 $IPVETH1 && {
failure "test_drop_all ${1}: Unexpected success of ping"
}
match_trace "$(get_trace)" "
dropping with: 2
dropping with: 2
dropping with: 2" || exit 1
remove_prog $1
}
function test_drop_all_in {
test_start "test_drop_all on lwt in"
install_test in drop_all
ping -c 3 $IP_LOCAL && {
failure "test_drop_all in: Unexpected success of ping"
}
match_trace "$(get_trace)" "
dropping with: 2
dropping with: 2
dropping with: 2" || exit 1
remove_prog in
}
function test_push_ll_and_redirect {
test_start "test_push_ll_and_redirect on lwt xmit"
install_test xmit push_ll_and_redirect
ping -c 3 $IPVETH1 || {
failure "Redirected packets appear to be dropped"
}
match_trace "$(get_trace)" "
redirected to $DST_IFINDEX
redirected to $DST_IFINDEX
redirected to $DST_IFINDEX" || exit 1
remove_prog xmit
}
function test_no_l2_and_redirect {
test_start "test_no_l2_and_redirect on lwt xmit"
install_test xmit fill_garbage_and_redirect
ping -c 3 $IPVETH1 && {
failure "Unexpected success despite lack of L2 header"
}
match_trace "$(get_trace)" "
redirected to $DST_IFINDEX
redirected to $DST_IFINDEX
redirected to $DST_IFINDEX" || exit 1
remove_prog xmit
}
function test_rewrite {
test_start "test_rewrite on lwt xmit"
install_test xmit test_rewrite
ping -c 3 $IPVETH1 || {
failure "Rewritten packets appear to be dropped"
}
match_trace "$(get_trace)" "
out: rewriting from 2fea8c0 to 3fea8c0
out: rewriting from 2fea8c0 to 3fea8c0
out: rewriting from 2fea8c0 to 3fea8c0" || exit 1
remove_prog out
}
function test_fill_garbage {
test_start "test_fill_garbage on lwt xmit"
install_test xmit fill_garbage
ping -c 3 $IPVETH1 && {
failure "test_drop_all ${1}: Unexpected success of ping"
}
match_trace "$(get_trace)" "
Set initial 96 bytes of header to FF
Set initial 96 bytes of header to FF
Set initial 96 bytes of header to FF" || exit 1
remove_prog xmit
}
function test_netperf_nop {
test_start "test_netperf_nop on lwt xmit"
install_test xmit nop
netperf -H $IPVETH1 -t TCP_STREAM || {
failure "packets appear to be dropped"
}
match_trace "$(get_trace)" ""|| exit 1
remove_prog xmit
}
function test_netperf_redirect {
test_start "test_netperf_redirect on lwt xmit"
install_test xmit push_ll_and_redirect_silent
netperf -H $IPVETH1 -t TCP_STREAM || {
failure "Rewritten packets appear to be dropped"
}
match_trace "$(get_trace)" ""|| exit 1
remove_prog xmit
}
cleanup
setup_one_veth $NS1 $VETH0 $VETH1 $IPVETH0 $IPVETH1 $IPVETH1b
setup_one_veth $NS2 $VETH2 $VETH3 $IPVETH2 $IPVETH3
ip netns exec $NS1 netserver
echo 1 > ${TRACE_ROOT}/tracing_on
echo nocontext-info > ${TRACE_ROOT}/trace_options
DST_MAC=$(lookup_mac $VETH1 $NS1)
SRC_MAC=$(lookup_mac $VETH0)
DST_IFINDEX=$(cat /sys/class/net/$VETH0/ifindex)
CLANG_OPTS="-O2 --target=bpf -I ../include/"
CLANG_OPTS+=" -DSRC_MAC=$SRC_MAC -DDST_MAC=$DST_MAC -DDST_IFINDEX=$DST_IFINDEX"
clang $CLANG_OPTS -c $PROG_SRC -o $BPF_PROG
test_ctx_xmit
test_ctx_out
test_ctx_in
test_data "xmit"
test_data "out"
test_data_in
test_cb "xmit"
test_cb "out"
test_cb_in
test_drop_all "xmit"
test_drop_all "out"
test_drop_all_in
test_rewrite
test_push_ll_and_redirect
test_no_l2_and_redirect
test_fill_garbage
test_netperf_nop
test_netperf_redirect
cleanup
echo 0 > ${TRACE_ROOT}/tracing_on
echo $CONTEXT_INFO > ${TRACE_ROOT}/trace_options
exit 0